Gate.



' 1. H. CAIRNS.

GATE.

APPLICATION FILED JUNE l. mu;

Patented Jan. 21, 1919.

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GATE.

APPLICATION FILED JUNE 7. 1918 w w 1 0 n Jm m w 1 m a v E UNITED STATES PATENT. OFFICE.

JOHN H. CAIRNS, OF IiASA-LLE, ILLINOIS,

GATE.

specification of Letters Patent.

Patented Jan. 21. 1919.

Application filed June 7. 1918. Serial No. 238.780.

caused to automatically open as a vehicle approaches the gate and to close after the vehicle has passed through the gate. .a

The object of the invention is to provide improved gate operating means of this kind which is simple in construction. is positive and, automatic in operation. which mav be,

readily installed. and which is not likely to get out of order.

'ith the above and other objects in view, the invention consists in the construction. combination and arrangement of devices hereinafter described and claimed. In the accompanying drawings Figure l is a plan of a gate and gate operating means constructed and arranged in accordance with mv invention, and showing .the gatein closed position.

Fi .2 is an elevation of the gate and a cross section of the platform and gateway on the plane indicated by the line 22. of Fig. l. 1 Fig. 3 is a detail plan of the gate operating means and alsoshows the gate leaves in open position. p i Fig. 'lis a similar view. onia larger of one of the prime moving segment and its connections.

Fig. 5 is an end elevation of one of the treads and its connections. and showing a portion of the base or gate or roadway in segtion.

,Fig. 6 is a detailed sectional view on the plane indicated by the line (#43 o Fig. 4:.

Fig. 7 a detailedsectional view of the gate-and of one of the holding means therefor. 7

Fig. is a detail view of the connecting bar and one of. the segment pinions A gateway is indicated at l and is here shown as provided with a platform 2- under scale. gears which an excaation 3 in which the gate residing at- Laoperating mechanism is installed. The gate comprises a pair of leaves 4' which may be of the construction here. shown or of any suitable construction and each of which is mounted as at 5 for turning movement on a vertical standard (i. the said standards being also mounted for turning movement independently of the gate leaves and supporting bearings 7 being here shown in which the lower ends of thegate standards are'mounted. Each gate standard has a horizontal arm 8 at its upper endgto partly extend over the gate leaf attached to said standard and preferably each standard also has a brace 9 for its arm Coiled retractile springs 10 connect the gate leaves to the standard arms 8. the said springs serving.

to normally keep and hold the gate leavesin line' vith the standard arms betore permitting the standard to turn to some extent.

independently of the gate leaves as will be undersood.

A roe t shaft 11 which extends across the' gatewav and in line with and below the gate standards is mounted in the bearings 7 and is also mounted in bearings which are provided in pillow blocks l2 and 13. The ends of the rock shaft are here shown as mounted in bearings 14. Secured to the rock sh'aftfor turning movement therewith and arranged near tlie ends of said shaft are mitersegment gears 15 and near one end of said shaft is also secured a segment pinion 16. The gate standards are .provided near their lower ends with segment miter gears 17 which engage the gears 15 and one of said standards is also provided with a segment spur gear 18v which engages a corresponding segment spur gear 19 which is here shown as mounted on a vertical stub shaft 20 which projects from the upper ,end of the pillow block 12.

Yndei; one side of the gate or roadway and at points spaced a suitable distance from opposite sides of the gate are prime moving segment gears 21 which are horizontally arranged and are mounted on suit able bearings as at 22. A connecting bar of suitable length extends along the same side of the gate or roadway and is arranged for longitudinal movement. suitable supporting guides 26 being here shown as provided therefor.

Said connecting bar is provided at it; ends with racks 27 which engage the prime moving gears 21 and is provided also, at. its

the gates to r 37 at either side of the gate,

with a rack 28 which engages the center,

side and at its centersald gear 16. On one bar is also provided with a rack. 29 which ing spring 34, which is a coiled retractile I spring, has one end secured at a fixed point at 35in line with the gate standards, the.

other end of said spring-being attached to ,the'ring 33. Said spring yields to permit partial rotation of the gear 30 and in connection with the ring and the traveler-rod serves to detain and hold said gear at the limitof its movement in either direction.

It will be understood from the, foregoing that the gears 21, rod 25 and gear 16 cause the rock shaft 11 to be turned'in onedirection or the other when either of the prime moving gears 21 is turned, and hence the gate will be opened or closed, the turning movements of the standard .6, which are communicated thereto from the shaft 11 by the gears 15 and 17 causing the arms 8 and the spring connections 10 between said arms and turn the latter with and .to some extent independently of the standards.

In order 'to cause the prime moving segment gears 21 to be operated by the wheels of a vehicle in approaching the gate from either direction or leaving after passing through the gate, I provide a pair of gate treads 36 and a pair of gate closing treads the gate opening treads being nearer the right hand side of the road, in either direction, than the left hand treads. In other words, the gate opening treads 36 at one side of the gate are substantially in line with the gate closing treads at the opposite side of the gate, so that the wheels of a wagon or other vehicle in approaching the gate from either side may be readily caused to pass over a' pair of the gate opening treads and to pass over a pair of the gate closing treads after having passed through the gate. The gate opening and closing treads are pivotally mounted atone end as at 36, 37 respectively, and springs 38 are provided which serve to raise the free ends of the treads so that each tread is normally held in an inclined position, the free ends of the opening treads extending toward the gate from opposite sides and the free ends of theclosing treads extending from the gate, as indicated clearly in Fig. 1 of the drawing. Under each gate opening tread-is a bell crank lever 39 having a long arm and a shortarm and said bell crank lever is pivot-ally mounted, as at 10. on a standard +11.- The short arm of the bell crank lever has aroller 42 which bears under the gate opening tread and the long arm ing the gate pass,over the treads 36 said treads are depressed, thereby causing the bell crank levers 39. to be turned and the rods 43 and element 23 to turn the prime moving gear 21 in the required direction to move the rod 13 endwise, said rod and the coacting elements hereinbefore described serving tovthereby cause the gates to open.

As the vehicle passes over the closing treads after having passed through the gate,

said closing treads aredepressed and the rods 50 impart reverse partial rotation to the other gear 21 and thus move a rod in the reverse direction and cause the gates to be reclosed.

I also provide means to hold the gate against casual -movement when in either closed or open position, such gate holding means being described as follows: The gate leaves or members are each provided on its underside with a substantially U-shaped keeper 51, said keepers being near the free ends of the gate members, as shown; A longitudinally movable rod 52 is irranged for movement through guide openings inthe 100 elements 13 and is provided witha pair of upwardly extending yieldabl'e latches 53 each of which has a horizontally bent 'arm 51 at its upper end, the said arms being adapted to enter the notches formed in the 105 the keepers 51, to hold the lowersides of The said rod is connected gate members. v

by a rod 55 with the. gear 19, as at 56. so

that said rod is operated by :said gear.

At oneside of the gateway -is a bell crank 110 lever 57 which 1s pivotally nounted as. t

and which has slots 59, 60in its arms; the rod 52 being connected to one arm of said lever bva pivot 61 which operates in the slot 59. Latches construction with the latches 53, are arranged at opposite sides of the-gateway; one of them being, mounted on a longitudinally movable rod 63 and the other on a rod 64.

The rod 63 is connected by a rod 65 to the 120 gear 1 as at (36. The rod (ii is connected to the bell crank lever 57 by a pin 67 which operates in the slot 60.

It will beunderstood that the gear 19 is turned by the gear 13 when the gate is: either 25 opened or closed. Owing to the loose connection between the gate members and the. standards 6. and the springs 10. a partial turning movement (32 which are identical in-l15 ot' the gear 19 is cti'ected before the gate members more and hence 'and during their opening-,inovemem the rods 63 and (34: will be actuated to put the arms of the latches 62 in the required position to snap into said keepers 51 as the gates reach a fully open position, and serve to hold the same in such position.

lYhileI have herein shown and described a preferred embodiment of my invention, I wouldha've it understood that changes may be made in the form,proportion and construction of the several parts, without des parting from the spirit of my invention, and within the scope of the appended claims. -Having thus described my invention, c-laim:- v

1. In combination with a gate, a standard mounted for turning movement and' on which the gate is mounted for independent swinging movement, means to turn the standard to swing the gate, said gate having a keeper, and gate detaining means to hold the gate against casual movement when open or closed, said gate detaining means comprising shdably mounted catches and a gear whcel to whichsaid catches are connected for movement thereby, the gate standard being provided with a gear which-i engages the first named gear.

In combination with a gate, a standard mounted for turning movement andzon which th'e gate is mounted, a rock shaft geared to the standard and provided with a pinion, prime moving pinions mounted atpoints spaced from opposite sides of the gate, a longitudinally movable connecting bar having racks engaging the pinion on v the rocksh ft and said prime moving gears,

and tread iiembers for engagement and op eration bv the wheels of vehicles, and connections between said tread members and v said prime moving gears, to actuate said gears and thereby cause the ate to be, opened and closed by passing ve iicles.

3. In combination with agate carrying standard mounted for turning movement and means to turn the same to open or close the gate, a detent-element meunted for piv- 0' al movement mind geared tosaid standard, tl e, pivot of the said element being in 1i 'ev w'th the standard and gate, ,nd said element having a segmental traveler, a ring.

engaging said traveler. and a detaining, spiing having one end secured at a fixed point and the other end connected tofsaid JOHN H. GAIRN S.l 

